Electric lamp



(No Model.)

F. H. BEERS.

ELECTRIC LAMP.

Patented Feb. 28,1882.

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UNITED STATES PATENT OFFICE.

FRANKLIN H. BEERS, OF NEYARK, NEV JERSEY, ASSIGNO'R, BY MESNE ASSIGNMENTS, TO THE METROPOLITAN ELECTRIC LIGHT AND POWER COMPANY OF THE UNITED STATES, OF NEV YORK.

ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent No. 254,261, dated February 28, 1882.

` Application filed June 27, 1881. (No model.)

To all whom it 'may concern:

Be it known that I, FRANKLIN H. BEERs, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented new and useful Improvements in Electric Lamps, of which the following is a specification.

This invention relates to electric-light mechanism; and it consists in the following speciro lied device or its equivalent, whereby the carbon sticks usually employed are automatically adjusted and kept in such position and relation to each other that a continuous and effective light shall be had without the necessity of manual interference.

This invention is illustrated in the accompanying drawings, in which- Figure 1 represents a sectional front view of my electric lamp, showing the connections with 2o the battery. Fig. 2 is a vertical section of the regulating mechanism on a larger scale than the previous figure, the line x x, Fig. 3, indieating the plane of section. Fig. 3 is a horizontal section in the plane y y, Fig. 2. Fig. 4 is a plan or top view of the clamp. Fig. 5 is a side elevation of the same.

Similar letters indicate corresponding parts. In the drawings, the letter A designates a frame, which consists of two upright metallic 3o rods, a a, and two metallic traverses, b b, one

at the top and the other at the bottom, the upper traverse, I), being insulated from both the upright rods a c, while the lower traverse, b is insulated from the upright rod a, but in metallic contact with the upright rod c. Said lower traverse is provided with a metallic socket or holder, d', for the reception of the lower carbon stick, c', while the upper carbon stick, c, is secured in a rod or holder, d, which 4o slides freely in the upper traverse, b, and is in metallic contact with the same.

To the upper traverse, b, is rmly securcd a box, B, which contains the mechanism for automatically adjusting the carbon sticks. This mechanism consists of two electro-magnets, C D,which are mounted in the box B, on opposite sides of the upper-carbon holder d. The cores of these electro-magnets are parallel to each other and at right angles to the carbon-holder d, and their armatures C D are 5o connected to arms E F, which extend from opposite sides of a hub, G, that is mounted on a rock-shaft, H. This rock-shaft has its bearings on center points, o, secured in the opposite sides ofthe box B. (See Fig. 3,) lt extends across this box at right angles to the carbon-holder d, and it is provided with an oblong eye,f, through which said carbon-holder-passes. On said rock-shaft is also mounted a double-armed lever, lm,one arm,mof which 6o is connected by a spring, g, with the arm h of a bell-crank lever, 7L t', that has its fulcrum on a pivot, j, secured in a standard, J, which rises from the bottoni of the box B. Through the upper end ot' this standard passes a screw, it, 65 whichl bears upon the arm tl of the bell-crank lever It z', and serves to adjust the tension of the spring g. This spring has a tendency to turn the rock-shaft H,with the armatures C D,

until the arm l of theleverl m strikes a screw, 7o

n, passing through a bracket, o, which is secured tothe box B; but if the lamp is iu operation the armatures C D assume the position shown in Fig. 2, as will be presently more fully explained.

From the eye f ofthe rock-shaft H extend two lugs, p, (see Fig. 3,) which form the bearings for a pivot, from which is suspended a rod, K, Fig. 2, the lower end of which is pivoted to the clamp L. This clamp consists vof 8o a lever, q, Figs. 4 and 5, to which are pivoted two jaws, i' r, at such a distance apart that the carbon-holder dy can be inserted between thein, and that when said lever is brought in the position shown in Fig. 2 the jaws will 85 bear upon the carbon-holder and prevent the same from sliding down; but as soon as the free end of the lever q strikes the bottom ofthe box or is otherwise raised the carbon-holder is released and permitted to drop. 9o

The connection of my lamp with the battery is made as follows: On the upper' traverse, l), are two binding-posts, P P', which, however, are insulated from said traverse. The binding-post l connects by a wire, 10, with the positive pole of the dynamo-electric machine or generator of electricity, and by a wire,11,with the coil of the electro-magnet D. The other end of this coil connects by a wire, 12, with the traverse b, and consequently with the upper-carbon holder d. From the binding-post P extends also a wire, 13, to one end of the helix ofthe electro-magnet C, the other end of which connects by a wire, 14, with the negative pole ot' the generator, and by a wire, 16, with the upright a'.

From this description it will be seen that the electro-magnet D is in a circuit which includes the two carbon sticks, as follows: Wires 10 l1, electro-magnet D, wire 12, carbon holder d, earhons c c', carbon-holder d', traverse b', upright a', and wires 16 15, while the helix of the electro-magnet C connects directly with the generator. The attraction torce exerted by the electro-magnet C therefore depends solely upon the strength of the battery-current, while the attraction force of the electromagnet D depends also upon the distance between the tips ot' the carbon sticks. When the electric current passes through the lamp the end l ot" the lever l m is drawn away fromthe screw n, and the armatures O' D' assume the position shown in Fig. 2, by which means the clamp L, through its connection with the roekshat't H, will be caused to grasp and lift the upper carbon stick, c, the required distance for the voltaic are, and as the carbons are consumed the current passing through the electro-magnet becomes weakened, the armature C' rises, and the armature D' sinks down, allowing the tail of the lever q to strike the bottom of the box B, the clamp L releases the carbon-holder, the carbon stick c drops, the force of the current passing` through the electro-magnet D is immediately increased, and the clamp L raises the Lipper carbon to the desired distance. In practice the armatures U' D' assume a constant oscillating motion, and the tips of the carbons are retained in the proper position toward each other, so that a steady light is obtained. This effect is due to the action of the two electro-magnets C D upon the oscillating armatures C' D. Any change in the force of the current passingthrough the lamp from the generator is immediately corrected by the electro-magnet C, while the action of the electro-magnet D upon the armature D', which is also affected to some extent by the changes of the main current, depends chiefly upon the distance between the tips of the carbon sticks, and by the combined action of the two electro-magnets and the oscillating armatures C' D' aregulating device is obtained which is extremely sensitive, and which reduces the flickering of the light to a minimum.

What I claim as new, and desire to secure by Letters Patent, is

1. In an electric lamp, the combination of a rock-shaft provided with a lateral projection or lug, an arma-ture connected with said shaft and arranged to oseillate in a vertical plane, and a clamp connected with the projection or lug on the rock-shaft, and operated thereby through the oscillating armature to lift the upper carbon, with two electro-magnets arranged at right angles to the plane of oscillation ot' the armature, one ot' said magnets being connected with the dynamo-electric generator and the other being in a circuit which includes the carbon sticks, substantially as and for the purposes described.

2. The combination, substantially as hereinbefore descrihed,of the carbon sticks and their holders, the electro-magnets C D, the cores of which extend parallel to eachother and at right angles to the carbon-holder d, the rockshaft H, the armatures C' D', secured to a spider which is mounted on said rock-shaft, and the clamp L, connected to an arm extending from the rock-shaft.

3. The combination, substantially as hereinbefore described, ot" the carbon sticks and their holders, the electro-magnets C D, the rock-shaft H, the armatures C' D', secured to a spider mounted on said rock-shaft, the lever Z m, set-screw ot, bell-crank lever 'i h, adjustingscrew 7a, and spring g.

4. The combination, with the horizontal rockshaft, the oscillating armature, and electromagnets, of a depending rod, K, connected with the rock-shalt, a lever, q, pivoted to the lower end of the rod, and two jaws, 1' i', having a pivotal connection with the lever on opposite sides of the carbon, substantially as described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

F. H. BEERS. lL. s.] Witnesses:

W. HAUFF, WILLIAM S. PARKER.

IOO 

